2009 Mercedes-Benz G550 Road Test Specs | Edmunds

2009 Mercedes-Benz G-Class - Road Test Specs

2009 Mercedes-Benz G-Class SUV

(5.5L V8 4x4 7-speed Automatic)


Model year2009
Style2009 Mercedes-Benz G-Class G550 4dr SUV 4WD (5.5L 8cyl 7A)
Base MSRP$100,250
Options on test vehicleNone
As-tested MSRP$101,125


Drive typeFour-wheel drive
Engine typeV8
Displacement (cc/cu-in)5,461cc (333 cu-in)
Block/head materialAluminum/aluminum
ValvetrainDouble overhead camshaft
Compression ratio (x:1)10.7
Redline (rpm)6,000
Horsepower (hp @ rpm)382 @ 6,000
Torque (lb-ft @ rpm)391 @ 2,800
Transmission type7-speed automatic
Transmission and axle ratios (x:1)I=4.38; II=2.86; III=1.92; IV=1.37; V=1.00; VI=0.82; VII=0.73; R=3.42


Suspension, frontSolid live axle, gas-pressurized shocks
Suspension, rearSolid live axle, gas-pressurized shocks
Steering typeRecirculating ball with hydraulic power steering
Tire brandYokohama
Tire modelGeolander H/T
Tire typeAll-season
Tire size, front265/60R18
Tire size, rear265/60R18
Wheel size18-by-7.5 inches front and rear
Wheel materialAlloy
Brakes, frontVentilated disc
Brakes, rearDisc

Track Test Results

0-45 mph (sec.)4.1
0-60 mph (sec.)6.6
0-75 mph (sec.)9.8
1/4-mile (sec. @ mph)14.9 @ 90.9
0-60 with 1 foot of rollout (sec.)6.3
Braking, 30-0 mph (ft.)31
60-0 mph (ft.)127
Slalom, 6 x 100 ft. (mph)50.6
Skid pad, 200-ft. diameter (lateral g)0.63
Sound level @ idle (dB)40.9
@ Full throttle (dB)75.8
@ 70 mph cruise (dB)69.8

Test Driver Ratings & Comments

Acceleration commentsOutstanding acceleration for a 5,600-pound SUV. Bizarre lack of pitch given its height and travel. Sounds awesome and never lacks power. Snaps off rapid upshifts, too.
Braking ratingGood
Braking commentsLong-travel pedal, which is good in an off-roader, but still feels awkward in a vehicle that (let's face it) won't ever be driven off-road. No dive. Mostly consistent stops.
Handling ratingAverage
Handling commentsThe G550 posted the lowest speed we've ever recorded in the slalom. This vehicle is not made for turning. Mercedes-Benz has made certain of this by electronically restraining it. On the skid pad, highly managed by stability control, virtually all throttle inputs are disabled. Stability control returns automatically at 35 mph.

Testing Conditions

Elevation (ft.)421

Fuel Consumption

EPA fuel economy (mpg)11 city/15 highway
Edmunds observed (mpg)13.7
Fuel tank capacity (U.S. gal.)25.4

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)5,622
Curb weight, as tested (lbs.)5,624
Weight distribution, as tested, f/r (%)50.4/49.6
Length (in.)184.5
Width (in.)71.8
Height (in.)76.0
Wheelbase (in.)112.2
Track, front (in.)58.0
Track, rear (in.)59.6
Turning circle (ft.)43.5
Legroom, front (in.)52.5
Legroom, rear (in.)41.9
Headroom, front (in.)42.2
Headroom, rear (in.)40.0
Shoulder room, front (in.)53.7
Shoulder room, rear (in.)56.3
Seating capacity5
Cargo volume (cu-ft)45.2
Max. cargo volume, seats folded (cu-ft)79.5


Bumper-to-bumper4 years/50,000 miles
Powertrain4 years/50,000 miles
Corrosion4 years/50,000 miles
Roadside assistanceUnlimited
Free scheduled maintenanceUnlimited years/3,000 miles


Front airbagsStandard
Side airbagsNot available
Head airbagsStandard front and rear
Knee airbagsNot available
Antilock brakes4-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlStandard
Stability controlStandard
Rollover protectionStandard
Tire-pressure monitoring systemTire-pressure monitoring
Emergency assistance systemNot available
NHTSA crash test, driverNot tested
NHTSA crash test, passengerNot tested
NHTSA crash test, side frontNot tested
NHTSA crash test, side rearNot tested
NHTSA rollover resistanceNot tested

New Car Buying Guides

See which cars and trucks our editors recommend